COMPOSITE STRUCTURAL MATERIAL AND METHOD OF MAKING SAME

摘要

A composite structural material suitable, for example, as a replacement for wooden boards, is disclosed. It comprises a dimensionally stable core materi al ensheathed in a dimensionally stable, laminar covering that is adherent to t he core material. The laminar covering is comprised of at least one layer of parallel cords (19) bonded to at least one layer of a rigidified web materia l (10) selected from the group consisting of paper and cloth. Suitable core materials include polyurethane foam (38), optionally filled with particles (32) of granulated rubber, expanded perlite, expandable polymer beads, and/o r glass microspheres. The parallel cords (19) preferably are supplied in the form of a strip of polyester cloth, as the warp cords thereof. The web material (10) preferably is kraft paper that is rigidified with an epoxy res in.